57FTM-10R O PERATING M ANUALCONVENIENCE F EATURESAF-VFO FEATUREBy default, the volume control (DIAL knob) and Clock display do not return to the fre-quency control automatically when you leave an interval of approximately three seconds.You may change the status of the DIAL knob so that the display will return automatically tothe Frequency select dial function and Frequency display.1. Press and hold the [VOL/SEL] key for one second to activate the Menu mode.2. Rotate the DIAL knob to select Menu Item “F5 AF-VFO”.3. Press the key to enable selection of this Menu Item.4. Rotate the DIAL knob to select the desired mode.TOGGLE: Keeps the DIAL knob function and displayuntil the [VOL/SEL] key is pressed once again.AUTOBACK: The DIAL knob function and display comesback to frequency selection and frequencydisplay approximately three seconds after.Press the [VOL/SEL] key to save the new setting and exit to normal operation.VOX O PERATIONThe VOX system provides automatic transmit/receive switching based on voice input to themicrophone. With the VOX system enabled, you do not need to press the PTT key in orderto transmit.1. Press and hold the [VOL/SEL] key for one second to activate the Menu mode.2. Rotate the DIAL knob to select Menu Item “F46 VOX MIC”.3. Press the key to enable selection of this Menu Item.4. Rotate the DIAL knob to select the one of the followingmicrophone functions.R-HAND: Enable the VOX operation for the microphonewhich is connected to the rear panel MIC Jack.F-HAND: Enable the VOX operation for the microphonewhich is connected to the front panel MIC Jack.FRONT: Enable the VOX operation for the front panel microphone.VOX OFF: Disable the VOX operation.5. Press the [VOL/SEL] key to save the new setting and exit to normal operation.To disable the VOX operation, just repeat the above procedure, rotating the DIAL knob toselect “VOX OFF” in step 4 above.P If the VOX feature is activated by background noise, adjust the VOX gain via the MenuItem “F47 VOX SENS”. See page 58 for details.P When the transceiver audio is output to the speaker, the VOX will not activate thetransmitter even if you talk directly into the microphone.